Device for facilitating the drilling of mower-cylinders



J. BRAUIL Device for Facilitating the Drilling 0f'MOWer-Oyl-inders.

Patented Mar. 30,1880.

Fig.2.

@itmssrs ATTOFQQ'EY.

NFEIERS, PHOTOJJTHOGRAPHER, WASHINGTON, D C,

UNITED STATES PATENT FFICE.

JOHN BRAUN, OF PHILADELPHIA, PENNSYLVANIA.

DEVICE FOR FACILITATING THE DRILLING 0F MOWER-CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 225,966, dated March30, 1880.

Application filed October 10, 1879.

To all whom it may concern Be it known that I, JOHN BRAUN, of the cityand county of Philadelphia, and State of Pennsylvania, have invented anew and useful Improvement in Devices for Facilitating the Drilling ofCylinders of Mowers, which improvement is fully set forth in thefollowing specification and accompanying drawings, in which Figure l isa side elevation of the device embodying my invention. Fig. 2 is a topor plan view thereof. Fig. 3 is a side elevation of a modification. Fig.4 is a face view thereof.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists of a stand for supporting the heads of a cylinderfrom the centor and lips for guiding drill-rods to the portions of thecylinder-heads to be drilled, whereby the drilling is economically,conveniently, and uniformly accomplished.

Referring to the drawings, A represents a stand or standard rising froma base, B, and having at its upper end an opening or boss, 0, for thereception of the shaft of the cylinderhead to be drilled, and a screw,0, passing through the boss, for tightening against said shaft.

Adjacent to the standard is supported a lip, D, which projects in suchmanner that when the cylinder-head is sustained by the standard A thelip extends close to the periphery of said head, and one of the lugs ofthe head, to which the cutters are riveted, extends under the lip. Inthe lip are formed openings a a, adapted to permit the entrance of thedrillrod employed for drilling the lugs of the cylinder-head.

WVhen the cylinder-head is properly adjusted the screw 0 is turned so asto hold the same securely in position. The drill-rod is advanced throughone opening of the lip D, then withdrawn and passed through the otheropenin g, whereby the lug has formed in it two' holes for the subsequentinsertion of the rivets. The screw G is then loosened, and the cylinderdrawn from the standard A and rotated and another lug brought under thelip, and the screw 0 again tightened. The drilling operation is repeatedand the workcontinued until all the lugs are drilled.

Figs. 3 and 4 show a modification in which a post is substituted for theboss for supporting a head having its shaft disconnected, and I employ alip, D, for each lug. In this case the drill-rods are arrangedhorizontally, and each lip is brought successively to them.

It will be seen that by these means cylinderheads may be drilledeconomically, conveniently, and uniformly.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- The stand A, boss 0, and the perforatedlip or lips D, constructed, combined, and operating substantially as andfor the purpose set forth.

JOHN BRAUN.

' Witnesses JOHN A. WIEDER-SHEIM, A. P. GRANT.

